Content output apparatus, mobile apparatus, and controlling methods thereof

ABSTRACT

A content output apparatus, methods for controlling a content apparatus, and a mobile apparatus are provided. The content output apparatus includes a receiver configured to receive content, a display configured to output a video signal of the content, a speaker configured to output an audio signal of the content, a communicator configured to transmit the audio signal to at least one external speaker, and a controller configured to determine whether the audio signal is related to the video signal, and display a user interface screen for inducing a selection of an output mode which transmits the audio signal to the at least one external speaker with a communication method corresponding to the determination result among a plurality of output modes via the display.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority from Korean Patent Application No.10-2014-0081042, filed on Jun. 30, 2014 in the Korean IntellectualProperty Office, and U.S. Provisional Application No. 61/994,377, filedon May 16, 2014, the disclosures of which are incorporated herein byreference in their entireties.

BACKGROUND

1. Field

Apparatuses and methods consistent with exemplary embodiments relate toa content output apparatus, a mobile apparatus, and controlling methodsthereof, and more particularly, to a content output apparatus thattransmits an audio signal to a plurality of speakers and selectivelysets an output mode for synchronization of the audio signal, a mobileapparatus, and controlling method thereof.

2. Description of the Related Art

Technology that allows an audio signal output from a multimediareproducing apparatus to be transmitted to a plurality of speakerdevices coupled to the multimedia reproducing apparatus through wirelessnetwork connections, and the audio signal to be output by the pluralityof speaker devices has been widely used.

The quality of audio reproduction can be limited due to design andstructural issues of an apparatus such as a television (TV), which canhave a relatively poor sound quality as compared to speaker devices thathave a high sound quality speaker function. Such speaker devices can becoupled with a TV or other content providing device using wirelessnetwork connections, thus making it is possible to listen to music orother audio reproduction with improved sound quality.

However, when an audio signal that is reproduced by the TV in real timeis also transmitted via network connections to the plurality of speakerdevices located away from the TV, a transmission delay occurs. Thetransmission delay increases in proportion to the distance that theaudio signal is transmitted.

If content to be reproduced in real time is music or other audio-onlycontent that involves only a an audio signal, reproduction of audio maybe delayed at the transmission side, such that reproduction at thetransmission side is in synchronization with an output of a speakercoupled through a network. However, if an apparatus simultaneouslyoutputs a video signal and a audio signal, such as a TV, and the audiosignal output is delayed, the audio signal of the TV will not be insynchronization with the video signal of the TV.

There is an increased need to automatically set outputs between an audiosignal and a video signal that is output from a content output apparatusand an audio signal that is output from an external speaker and/or todisplay a message related to the output and notify the user of theoutput.

SUMMARY

One or more exemplary embodiments may overcome the above disadvantagesand other disadvantages not described above. However, it is understoodthat one or more exemplary embodiments are not required to overcome thedisadvantages described above, and one or more exemplary embodiments maynot necessarily overcome any of the problems described above.

One or more exemplary embodiments provide a content output apparatusthat can be selectively operated in one output mode among a plurality ofoutput modes according to a reproduction mode of content and the type ofcontent output apparatus, a mobile apparatus, and controlling methodthereof.

According to an aspect of an exemplary embodiment, there is provided acontent output apparatus. The content output apparatus may include: areceiver configured to receive content; a display configured to output avideo signal of the content; a speaker configured to output an audiosignal of the content; a communicator configured to transmit the audiosignal to at least one external speaker; and a controller configured todetermine whether the audio signal is related to the video signal, anddisplay a user interface screen for inducing a selection of an outputmode which transmits the audio signal to the at least one externalspeaker with a communication method corresponding to the determinationresult among a plurality of output modes via the display.

The controller may control the display and the speaker to output thevideo signal and the audio signal through synchronization with an audiosignal output operation of the at least one external speaker in a firstoutput mode among the plurality of output modes, and control the speakerto output the audio signal through synchronization with the audio signaloutput operation of the at least one external speaker in a second outputmode among the plurality of output modes.

The controller may be configured to in response to the audio signalbeing determined to be related to the video signal, even though a usermanipulation for selecting the second output mode via the user interfacescreen is input, display a user interface (UI) for inducing to selectthe first output mode or operate in the first output mode automatically.

The controller may be configured to in response to the audio signalbeing determined to be related to the video signal, activate a user UIfor selecting the first output mode and deactivate a user interface forselecting the second output mode in the user interface screen.

The controller may be configured to transmit the audio signal to the atleast one external speaker, and control the display and the speaker tooutput the video signal and the audio signal through synchronization ofthe video signal and the audio signal separately from the audio signaloutput operation of the at least one external speaker in a third outputmode among the plurality of output modes.

The controller may be configured to control the communicator to performcommunication with the at least one external speaker in the first outputmode through a second communication method different from a firstcommunication method used in the second output mode and the third outputmode.

The controller may control the communicator to perform communicationwith the at least one external speaker through a Wi-Fi Direct method inthe first output mode, and to perform communication with the at leastone external speaker through a Wi-Fi method in the second output modeand the third output mode.

The controller may be operated in the first output mode in response tothe video signal being included in the content, and operated in thesecond output mode in response to the video signal being not included inthe content.

The content output apparatus may further include a connector configuredto be connectable to a source device configured to provide the content.The controller may determine whether or not the video signal is includedin the content based on the type of the source device coupled to theconnector.

The controller may be configured to be operated in one of the first tothird output modes according to a user operation for selecting theoutput mode.

The controller may be configured to display an information message foroutput mode selection in the display in response to the first outputmode being selected by the user operation in a state in which the videosignal is not included in the content.

The controller may be configured to be operated in one of the firstoutput mode and the third mode according to the user operation in astate in which the video signal is included in the content.

According to an aspect of an exemplary embodiment, there is provided amobile apparatus. The mobile apparatus may include: a communicatorconfigured to communicate with at least one external speaker; a userinterface configured to display a control screen for the at least oneexternal speaker; and a controller configured to control an operation ofthe external speaker according to a user operation input to the controlscreen. The controller may be configured to transmit a control signal,which controls a content output apparatus to communicate with theexternal speaker according to an output mode corresponding to the typeof the content output apparatus among a plurality of output modes, tothe content output apparatus in response to the content output apparatusconfigured to provide an audio signal to the external speaker beingselected in the control screen.

The plurality of output modes may include at least one of a first outputmode which provides the audio signal to the at least one externalspeaker and outputs a video signal and the audio signal throughsynchronization with an audio signal output operation of the at leastone external speaker, a second output mode which provides the audiosignal to the at least one external speaker and outputs the audio signalthrough synchronization with the audio signal output operation of the atleast one external speaker, and a third output mode which provides theaudio signal to the at least one external speaker and outputs the videosignal and the audio signal through synchronization of the video signaland the audio signal separately from the audio signal output operationof the at least one external speaker.

The controller may be configured to transmit the control signal forcontrolling the content output apparatus to be operated in one of thefirst output mode, which outputs the video signal and the audio signalthrough the synchronization with the audio signal output operation ofthe at least one external speaker, and the third output mode, whichoutputs the video signal and the audio signal through thesynchronization of the video signal and the audio signal separately fromthe audio signal output operation of the at least one external speaker,to the content output apparatus in response to the content outputapparatus being an apparatus configured to provide content including thevideo signal and the audio signal. The controller may transmit thecontrol signal for controlling the content output apparatus to beoperated in the second output mode, which outputs the audio signalthrough the synchronization with the audio signal output operation ofthe at least one external speaker, to the content output apparatus inresponse to the content output apparatus being an apparatus configuredto provide content including only the audio signal.

The controller may be configured to transmit the control signal, whichcontrols the content output apparatus to communicate with the externalspeaker according to one of the plurality of output modes determinedbased on a reproduction mode of the content provided from the contentoutput apparatus, to the content output apparatus in response to thecontent output apparatus configured to provide the audio signal to theat least one external speaker being selected in the control screen.

The controller may be configured to transmit the control signal, whichcontrols the content output apparatus to communicate with a groupedexternal speaker according to the output mode corresponding to the typeof the content output apparatus, to the content output apparatus inresponse to a user operation for grouping at least one of the at leastone external speaker being input to the control screen.

According to an aspect of an exemplary embodiment, there is provided amethod of controlling a content output apparatus including a receiverconfigured to receive content, a display configured to output a videosignal of the content, a speaker configured to output an audio signal ofthe content, and a communicator configured to transmit the audio signalto at least one external speaker. The method may include determiningwhether the audio signal is related to the video signal in response tothe contents being input; displaying a screen for inducing a selectionof an output mode which transmits the audio signal to the at least oneexternal speaker with a communication method corresponding to thedetermination result among a plurality of output modes; and transmittingthe audio signal of the content to the at least one external speaker byoperating the content in the selected output mode.

The transmitting may include controlling the display and the speaker tooutput the video signal and the audio signal through synchronizationwith an audio signal output operation of the at least one externalspeaker in a first output mode among the plurality of output modes, andcontrolling the speaker to output the audio signal throughsynchronization with the audio signal output operation of the at leastone external speaker in a second output mode among the plurality ofoutput modes.

According to an aspect of an exemplary embodiment, there is provided amethod of controlling a mobile apparatus. The method may includecommunicating with at least one external speaker; displaying a controlscreen for the at least one external speaker; and controlling anoperation of the external speaker according to a user operation input tothe control screen. The controlling may include transmitting a controlsignal, which controls a content output apparatus to communicate withthe external speaker according to an output mode corresponding to thetype of the content output apparatus among a plurality of output modes,to the content output apparatus in response to the content outputapparatus configured to provide an audio signal to the external speakerbeing selected in the control screen.

According to the above-described various exemplary embodiments, anoptimum mode for selectively synchronizing a video signal and an audiosignal of content with an audio signal of an external speaker may beautomatically set or may be guided and set by the user, and thusconvenience of the user may be increased.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or other aspects will be more apparent by describing indetail exemplary embodiments, with reference to the accompanyingdrawings, in which:

FIG. 1 is a block diagram illustrating a configuration of a contentoutput apparatus according to an exemplary embodiment;

FIG. 2 is a view illustrating a surround mode according to an exemplaryembodiment;

FIG. 3 is a block diagram illustrating a detailed configuration of acontroller according to an exemplary embodiment;

FIG. 4 is a block diagram illustrating a process of processing an audiosignal according to an exemplary embodiment;

FIG. 5 is a view illustrating a surround mode implemented through a TVas a content output apparatus and a plurality of external speakersaccording to an exemplary embodiment;

FIG. 6 is a view illustrating a process of processing and transmittingan audio signal to reduce transmission delay according to an exemplaryembodiment;

FIG. 7 is a flow chart illustrating a process of transmitting andreceiving an audio signal between a content output apparatus and anexternal speaker in a surround mode according to an exemplaryembodiment;

FIG. 8 is a view illustrating a multi-room mode according to anexemplary embodiment;

FIGS. 9 to 11 are views illustrating outputs of a video signal and anaudio signal of a content output apparatus and an output of an audiosignal of an external speaker according to a surround mode and amulti-room mode according to exemplary embodiments;

FIG. 12 is a block diagram illustrating a configuration of a contentoutput apparatus according to another exemplary embodiment;

FIG. 13 is a view illustrating an information message for output modeselection according to an exemplary embodiment;

FIGS. 14 to 16 are flow charts illustrating operation processes in oneof a plurality of output modes according to a user operation forselecting the output mode according to various exemplary embodiments;

FIG. 17 is a block diagram illustrating a configuration of a mobileapparatus according to an exemplary embodiment;

FIG. 18 is a view illustrating a process of setting an output mode to asurround mode through a mobile apparatus according to an exemplaryembodiment;

FIG. 19 is a view illustrating a process of determining an output modein response to an apparatus which can output a video signal beingselected as a source device according to an exemplary embodiment;

FIG. 20 is a view illustrating a process of determining a surround modein a user interface of a mobile apparatus according to an exemplaryembodiment;

FIG. 21 is a view illustrating a process of determining an output modein response to an external speaker being added in a state in which anapparatus that can output only an audio signal is a source deviceaccording to an exemplary embodiment;

FIG. 22 is a view illustrating a process of determining a multi-roommode in a user interface of a mobile apparatus according to an exemplaryembodiment;

FIG. 23 is a flow chart illustrating a method of controlling a contentoutput apparatus according to an exemplary embodiment; and

FIG. 24 is a flow chart illustrating a method of controlling a mobileapparatus according to an exemplary embodiment.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Hereinafter, exemplary embodiments will be described in more detail withreference to the accompanying drawings.

In the following description, the same reference numerals are used forthe same elements when they are depicted in different drawings. Thematters defined in the description, such as detailed construction andelements, are provided to assist in a comprehensive understanding of theexemplary embodiments. Thus, it is apparent that the exemplaryembodiments can be carried out without those specifically definedmatters. Also, functions or elements known in the related art are notdescribed in detail since they would obscure the exemplary embodimentswith unnecessary detail.

FIG. 1 is a block diagram illustrating a configuration of a contentoutput apparatus according to an exemplary embodiment.

Referring to FIG. 1, a content output apparatus 100 includes a receiver110, a display 120, a speaker 130, a communicator 140, and a controller150. Here, the content output apparatus 100 may be implemented withvarious types of electronic apparatus or systems such as a TV, a Blu-raydisc (BD) player, a home theater, a MP3 player, a compact disc (CD)player, a smart phone, a tablet personal computer (PC), a desk top PC,or a laptop PC.

The receiver 110 receives content. For example, in an exemplaryembodiment in which the content output apparatus 100 is a TV, thereceiver 110 may be implemented with a tuner, a cable receiver, or acommunicator. The receiver 110 may receive a broadcasting signal or anaudio signal through the tuner. The broadcasting signal may include avideo signal, an audio signal, and additional data (for example,electronic program guide (EPG) data). The receiver 110 may receive thebroadcasting signal from various sources such as terrestrialbroadcasting, cable broadcasting, satellite broadcasting, or Internetbroadcasting.

In another exemplary embodiment in which the content output apparatus100 is a laptop PC, the receiver 110 may be implemented with acommunicator or a communication module, and may receive various piecesof content from an internet website or a server.

The display 120 outputs a video signal of the content. That is, thedisplay 120 may display an image corresponding to the content. The imagemay include a still video image, a moving video image, document, aphotograph, or the like. Thus, the display 120 may be implemented as aliquid crystal display (LCD), an organic light emitting display (OLED),a plasma display panel (PDP), or the like.

The speaker 130 outputs an audio signal of the content. That is, thespeaker 130 may output the audio portion of the content. The speaker 130may be implemented to be included in or attached to the content outputapparatus 100. The speaker 130 may be implemented as a sound bar type ofspeaker that is located near the content output apparatus 100.

The communicator 140 transmits the audio signal of the content to atleast one external speaker. Specifically, the communicator 140 mayperform a connection operation to connect the content output apparatus100 to the at least one external speaker. For example, the communicator140 may couple the content output apparatus 100 to the at least oneexternal speaker using various communication methods, such as awired/wireless local area network (LAN), a wide area network (WAN),Ethernet, Bluetooth, Zigbee, a universal serial bus (USB) connection,IEEE 1394, or Wi-Fi. Further, the communicator 140 may also perform aconnection operation to connect content output apparatus to variousexternal apparatuses in addition to the external speaker. For this, thecommunicator 140 may include a chip, module, component, an input port,or the like corresponding to the communication methods. For example, inresponse to the communication being performed through a wired LANmethod, the communicator 140 may include a wired LAN card (not shown)and an input port (not shown).

The controller 150 may determine whether the audio signal is related tothe video signal, and display a user interface screen for inducing aselection of an output mode which transmits the audio signal to the atleast one external speaker with a communication method corresponding tothe determination result among a plurality of output modes via thedisplay. That is, the controller 150 may display a user interface screenfor inducing a selection of an appropriate output mode among a pluralityof output modes by a user according to whether the audio signal isrelated to the video signal.

For example, if an audio signal is related to a video signal, a user maydisplay a user interface screen for selecting an output mode whichtransmits an audio signal to at least one external speaker with aWiFi-direct communication method among a plurality of output modes bythe user, and if an audio signal is not related to a video signal, theuser may display a user interface screen for selecting an output modewhich transmits an audio signal to at least one external speaker with acommunication method using an access point (AP) among a plurality ofoutput modes by the user.

As a result of a determination whether an audio signal is related to avideo signal, if it is determined that an output mode selected by theuser does not correspond to the determination result appropriately, thecontroller 150 may display a user interface (UI) for inducting to selectan output mode corresponding to the determination result appropriately.

As a result of a determination whether an audio signal is related to avideo signal, if it is determined that an output mode selected by theuser does not correspond to the determination result appropriately, thecontroller 150 may operate automatically with an output modecorresponding to the determination result appropriately, and transmit anaudio signal to at least one external speaker.

The plurality of output modes may be output modes that synchronizeoutputs of a video signal and an audio signal of content with an outputof an audio signal of at least one external speaker. The plurality ofoutput modes may be largely divided into two output modes.

The plurality of output modes may include a surround mode and amulti-room mode.

The surround mode is an output mode that transmits an audio signalcorresponding to audio reproduced by a source device (e.g., the contentoutput apparatus, such as a TV, reproduces audio that corresponds to thedisplayed video portion of the content, as in the soundtrack of atelevision program or movie viewed on the TV) to at least one externalspeaker, and performs synchronization between the video signalcorresponding to the video of the content output apparatus and the audiosignal transmitted to the at least one external speaker. Thus, thereproduction of the audio signal by the at least one external speakercan be synchronized with the reproduction of the video by the contentoutput apparatus.

The surround mode may further include an output mode that performssynchronization among the video signal corresponding to the video of thecontent output apparatus, the audio signal output through the speaker130 included in the content output apparatus, and the audio signaltransmitted to the at least one external speaker. Thus, in this outputmode the reproduction of both the video and audio at the content outputapparatus is synchronized with the reproduction of audio by the at leastone external speaker.

Further, in exemplary embodiments the surround mode may be understood ashaving the same meaning as AV Sync technology, Group Play, 1 room, orDirect Audio.

Specifically, in exemplary embodiments the surround mode is a technologythat allows a user to listen to audio that is reproduced by at least oneexternal speaker that is located within a distance of a signaltransmitted through a Wi-Fi Direct method. The surround mode will bedescribed in detail with reference to FIG. 2.

FIG. 2 is a view illustrating a surround mode according to an exemplaryembodiment.

A TV as a source device 210, a sound bar and a plurality of externalspeakers as target devices 220, and a wireless router 230 serving as anaccess point (AP) are illustrated in FIG. 2.

The TV as the source device 210 performs wireless communication with thesound bar and the plurality of external speakers as target devices 220through the wireless router 230. Although FIG. 2 depicts target devices220 as including the sound bar and the plurality of external speakers,it is understood that the target device for wireless communication doesnot necessarily require all these devices, and in different exemplaryembodiments the sound bar may be the only target device, one or more ofthe external speakers may be the target device or devices, and in otherexemplary embodiments the sound bar and all external speakers may betarget devices. A Wi-Fi method 240 may be used as the wirelesscommunication method used to perform the wireless communication. Inaddition to the Wi-Fi method 240, a wireless communication method suchas Bluetooth or Zigbee may be used, but the wireless communicationmethod is not limited thereto.

Therefore, an audio signal corresponding to content being currentlyreproduced by the TV as the source device 210 is transmitted to thesound bar and the plurality of external speakers as target devices 220through the wireless router 230.

However, in response to the TV as the source device 210 being operatedin the surround mode, the audio signal corresponding to the contentbeing currently reproduced is transmitted to the sound bar and theplurality of external speakers as target devices 220 not through thewireless router 230 but by using a Wi-Fi Direct method 250. The Wi-FiDirect method allows devices to connect to one another directly withoutjoining a traditional network. That is, the TV as the source device 210may transmit the audio signal to the sound bar as the target device 220and the plurality of external speakers without the wireless router 230.Although the Wi-Fi Direct method is described, it is understood thatother connection methods may be utilized in other exemplary embodiments,in which the devices may communicate directly with each other withoutjoining a traditional network.

Thus, the transmission delay generated in response to the audio signalbeing transmitted using the Wi-Fi Direct method 250 instead is reducedas compared with transmission delay generated in response to the delaythat would be generated if the audio signal was transmitted using theWi-Fi method 240 in which the audio signal would be transmitted throughthe wireless router 230. The transmission delay generated in response tothe audio signal being transmitted using the Wi-Fi Direct method 250instead of being transmitted through wireless router 230 may be up to 45ms. Since a transmission delay of up to about 45 ms is an extremelysmall level in the context of synchronizing the audio signal and videosignal of content output from the TV as the source device 210, the audiosignal and video signal corresponding to the content output from the TVas the source device 210 will be in synchronization with the audiosignals output through the sound bar and the plurality of speakers astarget devices 220. That is, a delay of up to about 45 ms in audioreproduced by the external speakers as compared to the reproduction ofaudio and/or video by the TV is so small that the delay is not likely tobe perceived by the viewer.

Thus, the surround mode may be applied to the case where the audiosignal and the video signal corresponding to the content output from thecontent output apparatus 100 have to be in synchronization with theaudio signals which are corresponding to the content transmitted fromthe content output apparatus 100 and output through a plurality ofexternal speakers in the state in which the content output apparatus 100and the plurality of external speakers are location in the same room.Therefore, the surround mode is an optimized mode in the case where theuser mainly watches video through the content output apparatus 100 andlistens to audio through the plurality of speakers.

An exemplary embodiment for implementing the surround mode will bedescribed in detail with reference to FIG. 3.

FIG. 3 is a block diagram illustrating a detailed configuration of acontroller according to an exemplary embodiment.

Referring to FIG. 3, the controller 150 may include an audio/videodecoder 151, a video processor 152, an audio processor 153, and an audiocapturer 154.

A receiver 310 of a speaker, that is, a RX speaker 1 310, is illustratedin FIG. 3 and configured to receive an audio signal, divide channels ofthe audio signal according to speakers (e.g., by separating channels ofsurround sound content in accordance with the respective speaker thatwill output a particular channel), and reproduce the audio signal. RXspeakers 2, 3, 4, and 5 have the same configuration as the RX speaker 1and perform the same processing operation as the RX speaker 1 310, andthus only the description for the RX receiver 1 310 will be made. In anexemplary embodiment, RX speakers 1, 2, 3, 4, and 5 are speakers used ina surround sound operation and each speaker reproduces a specifiedchannel of the surround sound audio content.

The RX speaker 1 310 includes an audio receiver 311 and an audio player312.

The audio/video decoder 151 decodes a video signal and an audio signal,the video processor 152 processes picture quality of the decoded videosignal, and the audio processor 153 processes sound quality of thedecoded audio signal.

The audio capturer 154 may periodically capture the audio signal in realtime simultaneously in response to the audio signal being decoded by theaudio/video decoder 151.

The communicator 140 adds a meta data header including time informationand codec information to the audio signal captured in the audio capturer154, and transmits the audio signal with the added meta data header.

The audio receiver 311 of the RX speaker 1 310 may receive the audiosignal from the communicator 140, analyze the meta data header added tothe audio signal, and detect the time information and codec informationrelated to the captured audio signal.

The audio player 312 may reproduce an audio signal of a channelcorresponding to the RX speaker 1 310 through synchronization with audiosignals of the other external speakers 2, 3, 4, and 5 based on thedetected time information and codec information.

In particular, to operate in the surround mode, the content outputapparatus 100 has to output a video signal and an audio signalcorresponding to content and simultaneously the content output apparatus100 has to transmit the audio signal to the external speaker. This maybe implemented by decoding the audio signal through the audio/videodecoder 151, and simultaneously by periodically capturing the audiosignal in real time through the audio capturer 154 and transmitting thecaptured audio signal to the external speaker 310 through thecommunicator 140.

The method of processing the audio signal will be described in detailwith reference to FIG. 4.

FIG. 4 is a block diagram illustrating a process of processing an audiosignal according to an exemplary embodiment.

Referring to FIG. 4, an audio decoder 410 may correspond to theaudio/video decoder 151 of FIG. 3, and an audio renderer 420 maycorrespond to the audio processor 153 of FIG. 3.

An audio signal output through the audio renderer 420 may be buffered inan audio output buffer 430, and simultaneously output through anamplifier 440. At the same time, the audio signal output through theaudio renderer 420 may be periodically copied and buffered in the autocapture buffer 450. The audio signal buffered in the audio capturebuffer 450 may be periodically copied again and streamed to a Wi-Fidriver buffer 460. The Wi-Fi driver buffer 460 may transmit the streamedaudio signal to the external speaker through a Wi-Fi Direct method.

Through the method of processing an audio signal illustrated in FIG. 4,the controller 150 of the content output apparatus 100 maysimultaneously perform decoding of the audio signal and periodiccapturing of the audio signal. Therefore, the controller 150 may outputthe video signal and the audio signal corresponding to the content, andsimultaneously transmit the audio signal to the external speaker.

The audio decoder 410 illustrated in FIG. 4 may set an audio signalother than or in addition to a 5.1 channel to be output in a bit stream(element stream). Therefore, even in response to the audio signal otherthan or in addition to a 5.1 channel being decoded, an original soundmay be captured as it is, and then transmitted to the Wi-Fi driverbuffer 460. Here, “bit stream” is one of methods for converting digitalaudio data into an analog signal, and the digital audio data may beconverted into an analog signal by one bit through a bit stream D/Aconverter.

In response to the streamed audio signal being transmitted to anexternal speaker by the Wi-Fi driver buffer 460 through a Wi-Fi Directmethod, the Wi-Fi driver buffer 460 may transmit the audio signalthrough a layer that is below layer 2 (i.e., below the Data Link layer)of the seven layers of the Open System Interconnection (OSI) model, andthus the transmission delay may be reduced. The method of reducing thetransmission delay will be described later.

The operations performed in the audio decoder 410, the audio renderer420, the audio output buffer 430, the audio capture buffer 450, and theWi-Fi driver buffer 460 may be implemented with a program and executed,and may be implemented with modules in the controller 150.

FIG. 5 is a view illustrating that the surround mode is implementedthrough a TV as a content output apparatus and a plurality of externalspeakers according to an exemplary embodiment.

Referring to FIG. 5, a TV 510 as the content output apparatus 100 and aplurality of external speakers 530, 540, 550, 560, and 570 include onlycommercial Wi-Fi modules 511, 531, 541, 551, 561, and 571, and do notinclude a separate wireless receiving apparatus.

That is, the TV 510 and the plurality of external speakers 530 to 570may perform wireless communication 580 through a wireless router 520 asan access point (AP), and the wireless communication 580 may includeWi-Fi.

The TV 510 and the plurality of external speakers 530 to 570 mayexchange an audio signal without the wireless router 520, and at thistime, a Wi-Fi Direct method 590 may be used. In response to the TV 510being operated in the surround mode, the TV 510 and the plurality ofexternal speakers 530 to 570 may transmit and receive the audio signalwithout using the wireless router 520 but instead by using the Wi-FiDirect method 590, which enables the TV 510 to communicate with theexternal speakers 530 to 570 directly.

The TV 510 may output a video signal and simultaneously transmit theaudio signal with reduction in the transmission delay. Therefore, thevideo signal is in synchronization with the audio signals output throughthe plurality of speakers, and only the audio signal may be divided intoa 5.1 channel through the plurality of external speakers 530 to 570illustrated in FIG. 5 and then output.

In response to the communication being performed using a Wi-Fi Directmethod, the method of reducing the transmission delay will be describedin detail with reference to FIG. 6.

FIG. 6 is a view illustrating a process of processing an audio signaland transmitting the processed audio signal to reduce transmission delayaccording to an exemplary embodiment.

Referring to FIG. 6, in response to a decoded audio signal 611 outputfrom an audio decoder being captured and transmitted to an externalspeaker corresponding to an audio receiver 640 through a media accesscontrol (MAC) layer 620, which is a sub layer of Data Link layer 2 inthe seven layer OSI model, and a physical layer 630 (i.e., layer 1 inthe OSI model) together with a MAC address in a Wi-Fi driver stage, thecontroller 150 of the content output apparatus 100 corresponding to anaudio sender 610 outputs the received audio signal 611 to the externalspeaker through the physical layer 630 and the MAC layer 620 in reverseorder to the order of transmission of the decoded audio signal 611.

In response to data being transmitted to a wireless router from anapplication layer according to the OSI seven layer model and then thedata being transmitted from the wireless router to an external speakerin order to transmit the data on an existing wireless network, thetransmitted data is retransmitted through the OSI application layer.However, in the process illustrated in FIG. 6, the data is nottransmitted through all seven layers of the OSI model, as thetransmission only involves the Physical layer (layer 1) and the MAC sublayer of the Data Link layer (layer 2). Therefore, the time required forprocessing the data in the wireless router such as an AP may be reduced,and thus transmission delay may be reduced.

FIG. 7 is a flow chart illustrating a process of transmitting andreceiving an audio signal between a content output apparatus and anexternal speaker in a surround mode according to an exemplaryembodiment.

Referring to FIG. 7, in response to searching for speaker devicesexisting on a network, and a user command for setting the surround modebeing received through a user interface (UI) (S710), the controller 150may receive MAC addresses of the searched speaker devices (S720).

The controller 150 couples the content output apparatus 100 to thespeaker devices through a Wi-Fi Direct method (S730), and periodicallycaptures audio in response to the audio being reproduced in the contentoutput apparatus 100 (S740).

The controller 150 adds meta data such as time information to thecaptured audio data (S750), and in response to the audio data beingperiodically transmitted to the speaker devices on the basis of the MACaddresses (S760), the speaker devices receive the audio data and performsynchronization on only audio data corresponding to the set surroundmode, and output the synchronized audio data (S770).

The multi-room mode among a plurality of output modes is an output modethat synchronizes an audio signal output from a speaker included in asource device with an audio signal output from an external speaker evenif the output of the received audio signal by the external speaker isdelayed due to transmission delay resulting from the transmission of theaudio signal to the external speaker, which is coupled in a wireless orwired manner.

That is, the multi-room mode is an output mode that synchronizes theaudio signal output from the speaker 130 included in the content outputapparatus with an audio signal output through at least one externalspeaker when a video signal is not being output by the content outputapparatus 100 but only the audio signal is being output.

Further, in exemplary embodiments the multi-room mode may be understoodas having the same meaning as AA sync technology, Party play, or ZonePlay.

That is, the multi-room mode is an output mode that transmits an audiosignal to a plurality of speaker devices located some distance away overa network connection that includes a wireless router and performssynchronization on audio signals that are reproduced by the speakerdevices even in the case of a transmission delay being present when thespeaker devices are located a long distance away from the point oftransmission. The multi-room mode may be also used to performsynchronization on audio signals that are output from a plurality ofspeakers that may be located in different rooms.

FIG. 8 is a view illustrating a multi-room mode according to anexemplary embodiment.

Referring to FIG. 8, a TV as a source device 810, a sound bar and aplurality of external speakers as target devices 820, and a wirelessrouter 830 serving as an access point (AP) are illustrated.

The TV as the source device 810 may perform wireless communication withthe sound bar and the plurality of speakers as target devices 820through the wireless router 830. Although FIG. 8 depicts target devices820 as including the sound bar and the plurality of external speakers,it is understood that the target device for wireless communication doesnot necessarily require all these devices, and in different exemplaryembodiments the sound bar may be the only target device, one or more ofthe external speakers may be the target device or devices, and in otherexemplary embodiments the sound bar and all external speakers may betarget devices. A Wi-Fi method 840 may be primarily used as the wirelesscommunication method used herein. In addition, the wirelesscommunication method such as Bluetooth or Zigbee may be used, but thewireless communication method is not limited thereto.

In response to the TV as the source device 810 being operated in themulti-room mode, an audio signal corresponding to content beingcurrently reproduced is transmitted to the sound bar and the pluralityof external speakers as target devices 820 through the wireless router830, and transmission delay may be generated up to 1 second.

The TV as the source device 810 may perform delay processing on theaudio signal corresponding to the content and output the delay-processedaudio signal. That is, the TV as the source device 810 may perform delayprocessing on the audio signal by the transmission delay generated inresponse to the audio signal being transmitted to one or more targetdevices 820, and output the delay-processed audio signal. Thus, theoutput of the audio signal at the source device may be delayed by anamount sufficient to account for the delay resulting from transmissionof the audio to a target device.

In response to the audio signal being delay-processed and output by theTV as the source device 810, the audio signal output from a speakerincluded in the TV as the source device 810 will be in synchronizationwith the audio signals output from the sound bar and the plurality ofexternal speakers as target devices 820.

A portion of the plurality of external speakers, for example, a speaker821 may re-transmit the audio signal received from the source device 810to another speaker 822. The one speaker 821 of the plurality of externalspeakers that re-transmits the audio signal may perform delay processingon the audio signal to account for the delay in transmission to theother speaker 822, and output the delay-processed audio signal.

Thus, the audio signal output through the one speaker 821 of theplurality of speakers will be in synchronization with the audio signaloutput through the other speaker 822, which receives the audio signalfrom the one speaker 821. The audio signal may be transmitted fartheraway through the communication method that connects the speakers.

The multi-room mode is a mode that is optimized in a case where the userdoes not watch video through the content output apparatus 100, butinstead listens to audio through a plurality of external speakers thatare located in different rooms (e.g., a multi-room speaker configurationwhere the speakers can be grouped to play the same content).

Hereinafter, a method of performing synchronization between a videosignal and an audio signal output from the content output apparatus andan audio signal output from an external speaker according to thesurround mode and the multi-room mode will be described, and twoexemplary embodiments for the multi-room mode will be described.

FIGS. 9 to 11 are views illustrating outputs of a video signal and anaudio signal of the content output apparatus and an output of an audiosignal of an external speaker according to a surround mode and amulti-room mode according to exemplary embodiments.

FIG. 9 illustrates the outputs of the video signal and the audio signalof the content output apparatus and the output of the audio signal ofthe external speaker in the surround mode in which no transmission delayexists or the transmission delay is minimal. The content outputapparatus 100 outputs a video signal 920 corresponding to contentthrough the display 120, and outputs an audio signal 930 correspondingto the content through the speaker 130. The content output apparatus 100transmits the audio signal 940 corresponding to the content to a networkspeaker using a Wi-Fi Direct method.

With reference to the horizontal axis of FIG. 9, which represents time,the point in time for starting the output of the video signal 920 outputby the display 120 is the same as point in time for starting the outputof the audio signal 930 output by the speaker 130.

Transmission delay 950 may be generated in which the starting point intime of outputting an audio signal 940 is delayed as a result of thesignal being transmitted using a W-Fi Direct method and output by anexternal speaker. In response to the generated transmission delay beingup to about 45 ms, the starting point in time of the audio signal 940being output may be correspondingly delayed up to about 45 ms. However,even in response to the starting point in time of the output of audiosignal 940 being delayed due to the transmission delay of about 45 ms,the delay is so small that it cannot be perceived by the user.

Therefore, the video signal 920 output through the display 120 of thecontent output apparatus 100, the audio signal 930 output through thespeaker 130 of the content output apparatus, and the audio signal 940output through the external speaker may be in synchronization, and thusthe surround mode may be realized.

FIG. 10 illustrates outputs of an audio signal of the content outputapparatus 100 and an audio signal of an external speaker in a multi-roommode 1 in which transmission delay occurs. The multi-room mode 1illustrated in FIG. 10 is a multi-room mode in which a video signal isnot output by the content output apparatus 100.

Specifically, the video signal corresponding to content is not outputfrom the content output apparatus 100, as indicated by No Video 1020. Anaudio signal 1030 corresponding to the content is output through thespeaker 130, and also transmitted to a network speaker using a wirelesscommunication method such as a Wi-Fi method.

The content output apparatus 100 may perform delay processing 1050 onthe audio signal 1030 corresponding to the content, and delay an outputstarting point of time of the audio signal 1030 output by the speaker130. An output starting point of time of an audio signal 1040 outputthrough the external speaker may be delayed by transmission delay 1060.If a wireless communication method is used that is not a directcommunication method such as not the WI-Fi Direct method but anothermethod such a conventional Wi-Fi communication, the transmission delaymay be up to 1 second. Therefore, the output starting point of time ofthe audio signal 1040 output through the external speaker may becorrespondingly delayed up to 1 second.

The content output apparatus 100 may perform the delay processing 1050on the audio signal 1030 corresponding to the content by up to 1 secondand output the delayed audio signal through the speaker 130.Accordingly, the audio signal 1030 output through the speaker 130 willbe in synchronization with the audio signal 1040 output through theexternal speaker, and the multi-room mode 1 may be realized.

FIG. 11 illustrates outputs of an audio signal and a video signal of thecontent output apparatus 100 and an output of an audio signal of anexternal speaker in a multi-room mode 2 in which transmission delayoccurs. The multi-room mode 2 illustrated in FIG. 11 is a multi-roommode in response to a video signal being output from the content outputapparatus 100 among multi-room modes.

Specifically, the content output apparatus 100 outputs a video signal1120 corresponding to content through the display 120, outputs an audiosignal 1130 corresponding to the content through the speaker 130, andalso transmits the audio signal 1130 corresponding to the content to anetwork speaker using a wireless communication method such as a Wi-Fimethod.

The video signal 1120 corresponding to the content output through thedisplay 120 is in synchronization with the audio signal 1130corresponding to the content output by the speaker 130. However, thestarting point in time of outputting the audio signal 1140 correspondingto the content output by the external speaker may be delayed bytransmission delay 1150, and thus the audio signal 1140 output throughthe external speaker will not be in synchronization with the videosignal 1120 output through the display 120 and the audio signal 1130output through the speaker 130.

If a wireless communication method is used that is not a directcommunication method such as the WI-Fi Direct method but another methodsuch as conventional Wi-Fi as in FIG. 10, the transmission delay 1150may be up to 1 second, and the output starting point of time of theaudio signal 1140 output through the external speaker may becorrespondingly delayed up to 1 second.

The multi-room mode 2 is an output mode that may be applied to a casewhere a first user watches video and listens to audio through a TV thatis located in one room, and a second user only listens to the audio thatis reproduced by a speaker located in a different room.

The above-described surround mode, multi-room mode 1, and multi-roommode 2 may be referred to as a first output mode, a second output mode,and a third output mode, respectively, according to an exemplaryembodiment.

The controller 150 may be optionally operated in one output mode among aplurality of output modes. Specifically, the controller 150 may controlthe display 120 and the speaker 130 to output a video signal and anaudio signal through synchronization with an audio signal outputoperation of at least one external speaker in the first output modeamong the plurality of output modes.

That is, in response to the audio signal of the at least one externalspeaker being output without transmission delay or being delayed andoutput by transmission delay that cannot be perceived by the user, thecontroller 150 may output the video signal and the audio signal throughthe synchronization with the audio signal output operation of at leastone external speaker in the surround mode corresponding to the firstoutput mode as illustrated in FIG. 9.

The reason that no transmission delay exists or transmission delay is sosmall that is not noticeable in the surround mode has been previouslydescribed, and thus detailed description thereof will not be repeated.

Because the starting point in time of outputting the audio signal of theat least one external speaker is delayed by a transmission delay thatcannot be perceived by the user or there is no transmission delay, evenin response to the video signal and the audio signal being output bysimultaneously controlling the display 120 and the speaker 130 throughthe controller 150 without purposely addressing the audio signal outputoperation of the at least one external speaker, the audio signalreproduced by the at least one external speaker will be synchronizedwith the output of the video signal.

The controller 150 may control the speaker 130 to output the audiosignal through the synchronization with the audio signal outputoperation of the at least one external speaker in the second output modeamong the plurality of output modes.

That is, in the multi-room mode 1 corresponding to the second outputmode, as illustrated in FIG. 10, no video signal is output through thedisplay 120 of the content output apparatus 100, and the starting pointin time of outputting the audio signal by the at least one externalspeaker is delayed due to the transmission delay. The generatedtransmission delay may be up to 1 second, and the starting point in timeof outputting the audio signal by the at least one external speaker mayalso be delayed up to 1 second.

Therefore, the controller 150 may compulsorily delay (for example, byintroducing a delay by buffering the signal) the audio signal outputthrough the speaker 130 by a delay amount corresponding to the startingpoint in time of outputting the audio signal output by the at least oneexternal speaker so that the audio signal output by the speaker 130 isin synchronization with the audio signal output by the at least oneexternal speaker, and then output the synchronized audio signals.

If it is determined that the audio signal is related to the videosignal, the controller 150 may operate in the first output mode, and ifit is determined that the audio signal is not related to the videosignal, the controller 150 may operate in the second output mode.Especially, if it is determined that the audio signal is related to thevideo signal, even though a user manipulation for selecting the secondoutput mode is input via the user interface screen, the controller 150may display a UI for inducing to select the first output mode or operatein the first output mode.

If it is determined that the audio signal is related to the videosignal, the controller 150 may activate a UI for selecting the firstoutput mode and deactivate a UI for selecting the second output mode inthe user interface screen. Accordingly, a user may be induced to selectthe first output mode in the user interface screen.

Likewise, if it is determined that the audio signal is not related tothe video signal, the controller 150 may deactivate a UI for selectingthe first mode and activate a UI for selecting the second output mode inthe user interface screen. Accordingly, a user may be induced to selectthe second output mode in the user interface screen.

The UI for inducing a selection of a user regarding an output mode maybe implemented as an on screen display (OSD), a graphic user interface(GUI) and the like, and display the UI.

If a content includes a video signal, the controller 150 may determinethat an audio signal is related to a video signal, and if a content doesnot include a video signal, the controller 150 may determine that anaudio signal is not related to a video signal. This feature will bedescribed later.

The controller 150 may identically apply the operation which displays auser interface screen for inducing a selection of a user as describedabove to the third output mode which will be described later.

The controller 150 may transmit the audio signal to at least oneexternal speaker, and control the display 120 and the speaker 130 tooutput the video signal and the audio signal in synchronization with thevideo signal while the audio signal output operation by the at least oneexternal speaker is performed separately in the third output mode amongthe plurality of output modes.

That is, in the multi-room mode 2 corresponding to the third outputmode, as illustrated in FIG. 11, the video signal output by the display120 of the content output apparatus 100 exists, and the output startingpoint of time of the audio signal output by the at least one externalspeaker is delayed due to the transmission delay. The generatedtransmission delay may be up to 1 second, and the output starting pointof time of the audio signal output by the at least one external speakermay be correspondingly delayed up to 1 second.

However, the controller 150 may output the video signal output throughthe display 120 and the audio signal output through the speaker 130 notthrough the synchronization with the audio signal output operation ofthe at least one external speaker but through the synchronization of thevideo signal and the audio signal reproduced by the content outputapparatus 100. That is, the audio signal output through the speaker 130of the content output apparatus and the audio signal output through theat least one external speaker may be output with a time difference.

The controller 150 may control the communicator 140 to performcommunication with the at least one external speaker in the first outputmode through a second communication method different from a firstcommunication method in the second and third output modes.

Specifically, the controller 150 may perform communication with the atleast one external speaker in the surround mode corresponding to thefirst output mode through the communication method different from thecommunication method used in the multi-room mode 1 and the multi-roommode 2.

Thus, in response to the operation of the controller 150 being changedfrom the second output mode or the third output mode to the first outputmode, that is, from the multi-room mode 1 or the multi-room mode 2 tothe surround mode, the communication method with the at least oneexternal speaker is also changed.

The controller 150 may control the communicator 140 to performcommunication with the at least one external speaker in the first outputmode through a Wi-Fi Direct method, and to perform communication withthe at least one external speaker in the second out mode and the thirdoutput mode through a Wi-Fi method (e.g., not using a Wi-Fi Directmethod) .

That is, the controller 150 may control the communicator 140 to performcommunication with the at least one external speaker in the surroundmode corresponding to the first output mode through the Wi-Fi Directmethod, and to perform communication with the at least one externalspeaker in the multi-room mode 1 and the multi-room mode 2 correspondingto the second output mode and the third output mode through the Wi-Fimethod.

The Wi-Fi Direct method and the Wi-Fi method have been previouslydescribed, and it has been described that different communicationmethods are used according to the output modes. Thus, detaileddescription thereof will not be repeated.

The controller according to an exemplary embodiment may be operated inthe first output mode in response to a video signal being included incontent, and operated in the second output mode in response to the videosignal not being included in the content.

Specifically, the controller 150 may determine whether or not the videosignal is included in the content. The controller 150 may determinewhether or not the video signal is included in the content based on thekind or type of another apparatus coupled to the content outputapparatus 100. Further, the controller 150 may determine whether or notthe video signal is included in the content based on a file nameextension for the content.

For example, in response to “midi” or “mp3” being included in the filename extension for the content, the controller 150 may check whether thefile name extension indicates that the content is a file for musicreproduction, and determine that the video signal is not included in thecontent. In response to “avi” being is included in the file nameextension for the content, the controller 150 may check whether the filename extension indicates that the content is a file for moving imagereproduction, and determine that the video signal is included in thecontent.

The controller 150 may determine whether or not the video signal isincluded in the content based on codec information related to thecontent or meta data added to the content, which indicates the kind ofcontent.

The controller 150 may be operated in the first output mode that outputsthe video signal and simultaneously performs synchronization between thevideo signal and the audio signal output by the speaker 130 and theaudio signal output through the external speaker in response to thevideo signal being included in the content. The controller may beoperated in the second output mode which compulsorily delays the audiosignal output by the speaker 130 and outputs the delayed audio signaloutput through the speaker 130 in such a manner that the audio signaloutput by the speaker 130 is in synchronization with the audio signaloutput by the external speaker in response to the video signal not beingincluded in the content.

The controller 150 may determine whether or not the video signal isincluded in the content based on the kind or type of another apparatuscoupled to the content output apparatus 100, and an exemplary embodimentof the determination method will be described in detail with referenceto FIG. 12.

FIG. 12 is a block diagram illustrating a configuration of a contentoutput apparatus according to another exemplary embodiment.

Referring to FIG. 12, a content output apparatus 1200 includes areceiver 110, a display 120, a speaker 130, a communicator 140, acontroller 150, and a connector 160. The configurations and operationsof the receiver 110, the display 120, the speaker 130, and thecommunicator 140 are the same as those of the receiver 110, the display120, the speaker 130, and the communicator 140 illustrated in FIG. 1,and thus detailed description thereof will not be repeated.

The connector 160 may be coupled to a source device configured toprovide content. That is, the content output apparatus 1200 may becoupled to another source device through the connector 160, and mayreceive the content from the other source device through the connector160.

For example, it may be assumed that a TV as the content output apparatusis coupled to a Universal Serial Bus (USB) device including a music fileor a CD player through the connector 160. Alternatively, it may beassumed that a set-top box as the content output apparatus is coupled toa TV through the connector 160.

The controller 150 may determine whether or not a video signal isincluded in the content based on the kind or type of source devicecoupled through the connector 160. Specifically, in response to the TVas the content output apparatus 1200 being coupled to the CD playerthrough the connector 160, the controller 150 may check that a sourcedevice coupled through the connector 160 is the CD player, and thecontroller 150 may determine that a video signal is not included incontent output from the CD player since the CD player is a type ofsource device that reproduces audio (e.g., music). In other words, theCD player would be determined to be an audio only type of source device.The controller 150 may be operated in the second output mode, that is,the multi-room mode 1 in response to determining that the video signalis not included in the content.

In response to a set-top box as the content output apparatus 1200 beingcoupled to a TV through the connector 160, the controller 150 may checkthat a source device coupled through the connector 160 is the TV, anddetermine that a video signal is included in content output from the TVsince the TV is a video reproduction apparatus, or a type of device thatsupplies both video and audio. The controller 150 may be operated in thefirst output mode, that is, the surround mode in response to beingdetermined that the video signal is included in the content.

In response to a BD player or a digital versatile disc (DVD) playerbeing connected through the connector, since the BD player and the DVDplayer are mainly video reproduction apparatuses, the controller 150 maydetermine that a video signal is included in content output from the BDplayer or the DVD player.

The controller 150 may determine whether or not a video signal isincluded in content by considering the kind or type of source devicecoupled to the content output apparatus as well as a filename extensionfor the content.

For example, in response to a TV as the content output apparatus 1200being coupled to a USB device through the connector 160, since the USBdevice may include both a music file and a moving image file, thecontroller 150 may be unable to determine whether or not a video signalis include in content based on only the fact that the USB device isconnected. Therefore, the controller 150 may determine whether or notthe video signal is included in the content by considering a filenameextension for the content provided from the USB device coupled throughthe connector 160 together with the kind or type of USB device.

In response to content being changed by the user, for example, inresponse to the user being watching a movie on a TV and then downloadinga music file through Internet and reproducing music with the TV, thecontroller 150 may determine whether or not a video signal is includedin content based on a filename extension for the currently outputcontent. In response to the movie being displayed by the TV, and thenthe music being reproduced by the TV, since the content output by the TVis changed from content in which a video signal is included to contentin which no video signal is included, the controller 150 may be operatedin the first output mode, and then operated in the second output modeaccording to the content change.

The controller 150 may be operated in one of the first to third outputmodes according to a user operation for selecting an output mode.Specifically, the controller 150 may determine whether or not a videosignal is included in content based on the kind of source device coupledto the content output apparatus or a filename extension for the content,and then the controller 150 may be automatically operated in one of thefirst to third output modes. Further, in response to a user operationfor selecting the output mode being input, the controller 150 may bemanually operated in the one of the first to third output modesaccording to the input user operation.

For example, in response to an apparatus coupled through the connector160 of the content output apparatus 1200 being a CD player, thecontroller 150 may determine that a video signal is not included incontent output from the CD player since the CD player is a musicreproduction apparatus, and may be automatically operated in the firstoutput mode. However, there may be a case where the user want to watch astill image through the display 120 of the content output apparatus1200, and to listen to a music file provided to the CD player coupled tothe content output apparatus 1200 through the speaker 130 of the contentoutput apparatus 1200 and at least one external speaker. In this case, avideo signal corresponding to the still image output through the display120 of the content output apparatus 1200 and an audio signal, which isprovided from the CD player coupled through the connector 160 of thecontent output apparatus 1200 and output through the speaker 130 and theat least one external speaker, do not have to be in synchronization witheach other. Therefore, even when the controller 150 determines the kindof connected source device and determines the content output apparatusto be automatically operated in the first output mode, the controller150 may be operated in the second output mode according to a useroperation for selecting the second output mode in response to the secondoutput mode, in which the audio signal of the at least one externalspeaker is synchronization with the audio signal output through thespeaker 130, being desired by the user.

Although it is assumed that the video signal is not output from thecontent output apparatus 100 in the second output mode, that is, themulti-room mode 1 which has been described in FIG. 10, the descriptionfor the multi-room mode 1 may also be applied to the circumstances likethe above-described example in which the video signal output from thecontent output apparatus 1200 and the audio signals output from the atleast one external speaker and the speaker 130 do not have to be insynchronization with each other in response to the video signal beingoutput from the content output apparatus 1200.

Further, in response to the first output mode being selected through auser operation in the state in which the video signal is not included inthe content, the controller 150 may display an information message forthe output mode selection in the display 120.

That is, the controller 150 may be automatically operated in the secondoutput mode in the state in which the video signal is not included inthe content, and in response to the user operation for selecting thefirst output mode being input, the controller may display a descriptionfor the first output mode suitable for the case where the video signalis included in the content and the information message for the outputmode selection, in which the second output mode is more suitable in acurrent state, in the display 120. The description for the first outputmode may include contents in which the current content output apparatus1200 reproduces video as well as audio, and thus the first output modewith no transmission delay has to be selected so that the video signaloutput through the display 120, the audio signal output through thespeaker 130, and the audio signal output through the at least oneexternal speaker may be in synchronization with each other.

FIG. 13 is a view illustrating an information message for output modeselection according to an exemplary embodiment.

Referring to FIG. 13, a screen including a region 1310 for audio outputsetting and a region 1320 for an information message for output modeselection may be displayed in the display 120 of the content outputapparatus 100. The user may maintain or release connection to anexternal speaker through the item indicating whether or not the externalspeaker is coupled illustrated in the region 1310 for audio outputsetting. The user may additionally register another external speaker ordelete a previously registered external speaker through the item forspeaker addition/deletion illustrated in the region 1310. The user mayset one of a surround mode 1311 and a multi-room mode 1312 through theitem for audio output mode setting illustrated in the region 1310. It isassumed that the surround mode 1311 corresponds to the first outputmode, and the multi-room mode corresponds to the second output mode.

For example, in response to a user operation for selecting themulti-room mode 1320 being input in a state in which the content outputapparatus 100 is outputting content that includes a video signal, thecontroller 150 may determine that the surround mode, which is the firstoutput mode, is suitable as the output mode since the video signal isincluded in the content. Thus, the controller 150 may display a message“since video is currently output, the multi-room mode, which is suitablein response to only audio being output, is not suitable in the currentstate” within the region 1320 for displaying an information message.

The controller 150 may be operated in one of the first output mode andthe third output mode according to a user operation in a state in whicha video signal is included in content. That is, the controller 150 maybe automatically operated in the first output mode in the state in whichthe video signal is included in the content, but the controller 150 maybe operated in the third output mode in response to a user operationwhich does not select the first output mode being input.

Thus, the controller 150 may transmit the audio signal to the at leastone external speaker, and output the video signal and the audio signalthrough the synchronization of the video signal and the audio signalseparately from an audio signal output operation of the at least onespeaker. Therefore, the controller 150 may be operated to be suitablefor the case where the first user may watch video and listen to audiothrough a TV in a living room, and the second user may listen to onlythe audio in a different room located away from the living room.

FIGS. 14 to 16 are flow charts illustrating operation processes in oneof a plurality of output modes according to a user operation forselecting an output mode according to various exemplary embodiments.

Referring to FIG. 14, in response to a user operation for selecting amulti-room mode being input by the user (S1410), the controller 150 maydetermine whether or not a video signal is included in content (S1420),and the controller 150 may display a confirmation message for changingto the surround mode (first output mode) (S1430) in response to thevideo signal being included in the content (S1420—Y). In response to auser operation for selecting “YES” with respect to the confirmationmessage for changing to a surround mode being input (S1430—Y), thecontroller 150 may be operated in the surround mode according to theuser operation (S1440). The surround mode may be implemented with twoexemplary embodiments according to whether or not an audio signal is tobe output through the speaker 130 of the content output apparatus 100 .Specifically, in one exemplary embodiment, in response to the audiosignal that is to be output through the speaker 130, all the videosignal output through the display 120 of the content output apparatus100, the audio signal output through the speaker 130, and an audiosignal output through an external speaker are synchronized with eachother. In the other exemplary embodiment, in response to there being noaudio signal to be output through the speaker 130, the video signaloutput through the display 120 of the content output apparatus 100 andthe audio signal output through the external speaker are insynchronization with each other. In response to the video signal notbeing included in the content (S1420—N), the controller 150 may beautomatically operated in the multi-room mode 1 (second output mode)(S1450). Thus, the controller 150 may compulsorily perform delayprocessing on the audio signal output through the speaker 130 of thecontent output apparatus 100, and output the delay-processed audiosignal. Therefore, the audio signal output through the external speakermay be in synchronization with the audio signal output through thespeaker 130.

In response to a user operation for selecting “NO” with respect to theconformation message for changing to a surround mode being input(S1430—N), the controller 150 may be operated in the multi-room mode 2according to the user operation (S1460). The controller 150 may notcompulsorily perform delay processing on the audio signal output throughthe speaker 130 of the content output apparatus 100 but may insteaddirectly output the audio signal output through the speaker 130 withoutdelaying the output. Therefore, the audio signal output through thespeaker 130 is not in synchronization with the audio signal outputthrough the external speaker.

The process illustrated in FIG. 14 may be applied to the case where thecontroller 150 is operated in one of the first output mode and the thirdoutput mode according to the user operation in response to the videosignal being included in the content, and the controller 150 isautomatically operated in the second output mode in response to thevideo signal not being included in the content. Only the example inwhich the controller 150 automatically determines whether or not thevideo signal is included in the content has been described in FIG. 14.However, the user may directly input a user operation for determiningwhether or not the video signal is included in the content, and thus itmay be determined whether or not the video signal is included in thecontent from the user input.

Referring to FIG. 15, in response to a user operation for selecting themulti-room mode being input by the user (S1510), the controller 150determines whether or not a video signal is included in content (S1520).The controller 150 is automatically operated in the surround mode (firstoutput mode) (S1530) in response to the video signal being included inthe content (S1520—Y), and the controller 150 is automatically operatedin the multi-room mode 1 (second output mode) (S1540) in response to thevideo signal not being included in the content (S1520—N).

As described in FIG. 14, in response to the video signal being includedin the content, the controller 150 is operated according to the surroundmode, and the surround mode may be implemented with two exemplaryembodiments according to whether or not the audio signal is to be outputthrough the speaker 130 of the content output apparatus 100.Specifically, in one exemplary embodiment, in response to an audiosignal that is to be output through the speaker 130, all the videosignal output through the display 120 of the content output apparatus100, the audio signal output through the speaker 130, and an audiosignal output through an external speaker are synchronized with eachother. In the other exemplary embodiment, in response to there being noaudio signal to be output through the speaker 130, the video signaloutput through the display 120 of the content output apparatus 100 issynchronized with the audio signal output through the external speaker.Further, in response to the video signal being not included in thecontent (S1520—N), the controller 150 may be automatically operated inthe multi-room mode 1 (second output mode) (S1540), and thus thecontroller 150 may compulsorily perform delay processing on the audiosignal output by the speaker 130 of the content output apparatus 100,and output the delay-processed audio signal. Therefore, the audio signaloutput by the external speaker may be in synchronization with the audiosignal output by the speaker 130.

The process illustrated in FIG. 15 may be applied to the case where thecontroller 150 is automatically operated in one of the first output modeand the second output mode according to whether or not the video signalis included in the content.

Referring to FIG. 16, in response to a network speaker set menu beingentered by the user (S1610), the controller 150 determines whether ornot a video signal is include in content (S1620), and inactivates themulti-room mode (S1630) in response to the video signal being includedin the content (S1620—Y). That is, the controller 150 may inactivate themulti-room mode (S1630) in response to the video signal being includedin the content (S1620—Y), and allow the user not to select themulti-room mode from the beginning. The controller 150 may inactivatethe multi-room mode (S1630), and simultaneously the controller 150 maybe automatically operated in the surround mode (S1640). The surroundmode may be implemented with two exemplary embodiments according towhether or not an audio signal is output through the speaker 130 of thecontent output apparatus 100. Specifically, in one exemplary embodiment,in response to there being an audio signal to be output through thespeaker 130, all the video signal output through the display 120 of thecontent output apparatus 100, the audio signal output through thespeaker 130, and an audio signal output through the external speaker aresynchronized with each other. In the other exemplary embodiment, inresponse to there being no audio signal to be output through the speaker130, the video signal output through the display 120 of the contentoutput apparatus 100 is synchronized with and the audio signal outputthrough the external speaker.

In response to the video signal being not included in the content(S1620—N), the controller 150 may display a confirmation message forchange to a surround mode (first output mode) (S1650). In response to auser operation for selecting “YES” with respect to the confirmationmessage for changing to a surround mode being input (S1650—Y), thecontroller 150 may be operated in the surround mode according to theuser operation (S1640), and in response to a user operation forselecting “NO” with respect to the confirmation message for changing toa surround mode being input (S1650—N), the controller 150 may beoperated in the multi-room mode 1 according to the user operation(S1660). Thus, the controller 150 may perform delay processing on theaudio signal output through the speaker 130 of the content outputapparatus 100 and output the delay-processed audio signal. Therefore,the audio signal output by the external speaker can be insynchronization with the audio signal output through the speaker 130.

The process illustrated in FIG. 16 may be applied to the case where thecontroller 150 inactivates the multi-room mode (the second output modeor the third output mode) and is automatically operated in the surroundmode (the first output mode) in response to a determination that thevideo signal is included in the content, and the case where thecontroller 150 is operated in the surround mode or automaticallyoperated in the multi-room mode 1 (the second output mode) according toa user operation even though it may be determined that no video signalis present in response to the user operation for execution of thesurround mode being input.

Since a separate display is not included in a device such as an externalspeaker, there may be no user interface on the external speakerconfigured to input a user operation for setting of the externalspeaker. Thus, a mobile apparatus according to an exemplary embodimentmay be provided to display a control screen for the setting of theexternal speaker, and to receive the user operation for setting of anoutput mode through connection between a source device and the externalspeaker. Therefore, the user may set the external speaker using themobile apparatus, and the convenience of the user may be increased.Description for this will be made in detail with reference to FIG. 17.

FIG. 17 is a block diagram illustrating a configuration of a mobileapparatus according to an exemplary embodiment.

Referring to FIG. 17, a mobile apparatus 1700 includes a communicator1710, a user interface 1720, and a controller 1730.

The communicator 1710 may perform communication with at least oneexternal speaker. For example, the communicator 1710 may couple themobile apparatus 1700 and the at least one external speaker usingvarious communication methods such as wired/wireless LAN, WAN, Ethernet,Bluetooth, Zigbee, USB, IEEE 1394, and Wi-Fi. Further, the communicator1710 may perform connection between the mobile apparatus 1700 andvarious external apparatuses in addition to the connection between themobile apparatus 1700 and the at least one external speaker. For this,the communicator 1710 may include a chip, module or an input port thatcorresponds to the communication method. For example, in response to thecommunication being performed through a wired LAN method, thecommunicator 1710 may include a wired LAN card (not shown) and an inputport (not shown).

The user interface 1720 may display a control screen for the at leastone external speaker. For example, the user interface 1720 may beimplemented with a touch screen and receive a user touch operation forcontrol of the at least one external speaker. Further, the userinterface 1720 may display a control screen configured to receive a useroperation for volume control, sound quality control, and sound effectsetting of the external speaker and grouping between a plurality ofexternal speakers.

The controller 1730 may control an operation of the external speakeraccording to a user operation input to the control screen. For example,in response to a user operation for a volume UP/DOWN command of theexternal speaker being input, the controller 1730 may transmit a controlcommand for volume UP/DOWN to the external speaker according to theinput user operation.

In response to a user operation for setting a sound effect of theexternal speaker to a desired sound effect being input, such as a soundeffect for inside a car, the controller 1730 may transmit a controlcommand, which sets the sound effect of the external speaker to theeffect (inside a car) according to the input user operation, to theexternal speaker.

In response to a content output apparatus configured to provide an audiosignal to the external speaker being selected in the control screen, thecontroller 1730 may transmit the control signal, which controls thecontent output apparatus to communicate with the external speakeraccording to an output mode corresponding to the kind of content outputapparatus among a plurality of output modes, to the content outputapparatus. This operation of the controller 1730 will be described indetail with reference to FIG. 18.

FIG. 18 is a view illustrating an operation for setting an output modeto a surround mode through a mobile apparatus according to an exemplaryembodiment.

A TV as a source device 1810, an external speaker 1820 as a targetdevice, a wireless router 1840 serving as an access point (AP), and amobile apparatus 1830 configured to control the external speaker 1820are illustrated in FIG. 18.

The TV as the source device 1810, the external speaker 1820 as a targetdevice, and the mobile apparatus 1830 may perform wireless communicationthrough the wireless router 1840. A Wi-Fi method 1850 may be mainly usedas the wireless communication method used herein. A wirelesscommunication method such as Bluetooth or Zigbee may be used as thewires communication method used herein. However, the wirelesscommunication method is not limited thereto.

Therefore, to generally transmit an audio signal corresponding tocontent currently reproduced in the TV as the source device 1810 to theexternal speaker 1820 as a target device, the audio signal istransmitted through the wireless router 1840.

However, a user interface of the mobile apparatus 1830 configured toperform communication with the external speaker 1820 may display acontrol screen configured to control the external speaker 1820. Inresponse to a content output apparatus configured to provide the audiosignal to the external speaker 1820, that is, the source device 1810being selected through the control screen, the controller 1730 maytransmit the control signal, which controls the content output apparatusto communicate with the external speaker according to the output modecorresponding to the kind of content output apparatus among theplurality of output modes, to the content output apparatus.

That is, the controller 1730 may transmit the control signal to theselected source device 1810, and allow the selected source device 1810to determine the output mode corresponding to the kind of source device1810 and to output the audio signal to the external speaker according tothe determined output mode.

For example, in FIG. 18, the selected source device 1810 is a TV, andthe TV outputs a video signal. Therefore, the controller 1730 maytransmit the control signal, which determines an output modecorresponding to the TV as the selected source device and controls theTV to output an audio signal to the external speaker according to thedetermined output mode, to the TV.

The TV may be operated in the surround mode corresponding to anapparatus configured to output a video signal and may transmit an audiosignal corresponding to content currently reproduced to the externalspeaker 1820 as a target device not through the wireless router 1840 butby using a Wi-Fi Direct method 1860. That is, the TV as the sourcedevice 1810 may transmit the audio signal to the external speaker 1820as the target device without requiring the audio signal to betransmitted through the wireless router 1840.

Thus, transmission delay generated in response to the audio signal beingtransmitted using the Wi-Fi Direct method 1860 is reduced as comparedwith transmission delay generated in response to the audio signal beingtransmitted through the wireless router 1840 using the Wi-Fi method1850. The transmission delay generated in response to the audio signalbeing transmitted using the Wi-Fi Direct method 1860 may be up to about45 ms. The transmission delay of up to about 45 ms not significantenough to affect the synchronization with the video signal and the audiosignal corresponding to the content output from the TV as the sourcedevice 1810. Therefore, the audio signal and the video signalcorresponding to the content output from the TV as the source device1810 are synchronized with the audio signal output from the externalspeaker 1820 as a target device.

FIG. 18 has been described as an exemplary embodiment in which theexternal speaker is controlled through the mobile apparatus and thecontrol command is transmitted to the source device in the surroundmode. However, in another exemplary embodiment the external speaker maybe controlled through the mobile apparatus and the control commandtransmitted to the source device in the multi-room mode as well.

The plurality of output modes to be selected by the selected contentoutput apparatus may include at least one of a first output mode thatprovides the audio signal to the at least one external speaker, andoutputs the video signal and the audio signal in synchronization with anaudio signal output operation of the at least one external speaker, asecond output mode that provides the audio signal to the at least oneexternal speaker, and outputs the audio signal in synchronization withthe audio signal output operation of the at least one external speaker,and a third output mode that provides the audio signal to the at leastone external speaker, and outputs the video signal and the audio signaloutput by the content output apparatus in synchronization and the outputof the audio signal of the at least one external speaker is performedseparately. The first output mode corresponds to the surround mode, thesecond output mode corresponds to the multi-room mode 1, and the thirdoutput mode corresponds to the multi-room mode 2. The output modes havebeen previously described, and thus the detailed description thereofwill not be repeated.

In response to the content output apparatus being an apparatusconfigured to provide content including a video signal and an audiosignal, the controller 1730 may output the control signal forcontrolling the content output apparatus to be operated in one of thefirst output mode, which outputs the video signal and the audio signalthrough the synchronization with the audio signal output operation ofthe at least one external speaker, and the third output mode, whichoutputs the video signal and the audio signal in the synchronizationwith the video signal output by the content output apparatus and theaudio signal output operation of the at least one external speaker isperformed separately, to the content output apparatus. In response tothe content output apparatus being an apparatus configured to providecontent including only an audio signal, the controller 1730 may outputthe control signal for controlling the content output apparatus to beoperated in the second output mode, which outputs the audio signalthrough the synchronization with the audio signal output operation ofthe at least one external speaker, to the content output apparatus.

For example, in response to a content output apparatus selected in thecontrol screen being a TV, since the TV is an apparatus configured toprovide content including a video signal and an audio signal, thecontroller 1730 may transmit the control signal, which allows thecontent output apparatus to be operated in the first output mode thatoutputs the video signal and the audio signal through thesynchronization with the audio signal output operation of the at leastone external speaker, to the content output apparatus.

Further, in response to the content output apparatus selected in thecontrol screen being a CD player, and the CD player being an apparatusconfigured to provide content including only an audio signal, thecontroller 1730 may transmit the control signal, which allows thecontent output apparatus to be operated in the second output mode, whichoutputs the audio signal through the synchronization with the audiosignal output operation of the at least one external speaker, to thecontent output apparatus.

In response to a content output apparatus configured to provide an audiosignal to the at least one external speaker being selected in thecontrol screen, the controller 1730 may transmit the control signal,which allows the content output apparatus to communicate with theexternal speaker according to one of the plurality of output modesdetermined based on a reproduction mode of content provided from theselected content output apparatus, to the content output apparatus.

For example, in response to content provided from a TV being video inthe state in which the TV is selected as the content output apparatusconfigured to provide the audio signal to the at least one externalspeaker in the control screen, the video signal and the audio signal areoutput in the reproduction mode of the content since the contentincludes the video signal. Therefore, the controller 1730 may transmitthe control signal, which allows the TV to be operated in one of thefirst output mode and the third output mode, to the TV.

In response to the content provided from the TV being music, only anaudio signal is output in the reproduction mode of the content since thecontent includes only the audio signal. Therefore, the controller 1730may transmit the control signal, which allows the TV to be operated inthe second output mode, to the TV.

The process which has been previously described, in which the controller150 of the content output apparatus 1200 is operated in one of theplurality of output modes based on the kind of apparatus coupled throughthe connector 160 or based on whether or not the video signal isincluded in the content, may be equally applied to the case where themobile apparatus 1700 transmits the control signal to the content outputapparatus 1200.

FIG. 19 is a view illustrating a process for determining an output modein response to an apparatus which can output a video signal beingselected as a source device according to an exemplary embodiment.

Referring to FIG. 19, a user operation for selecting a source of anexternal speaker in a control screen of a mobile apparatus is input(S1910). In response to a user operation for selecting a TV amongvarious sources being input (S1920), a controller of the TV which is acontent output apparatus sets the output mode to the surround mode sincethe TV is an apparatus configured to reproduce a video signal (S1930).The controller may configure a network connection between the externalspeaker and the TV as a Wi-Fi method using a wireless router or a Wi-FiDirect method, which is a direct communication method that does not usethe wireless router (S1940). The video signal may be in synchronizationwith an audio signal without latency between the video signal and theaudio signal. Therefore, the audio signal output from the TV istransmitted to the external speaker and then output (S1950).

That is, the process illustrated in FIG. 19 may be applied to the casewhere the controller 1730 of the mobile apparatus 1700 is operated inthe first output mode that outputs a video signal and an audio signalthrough the synchronization with the audio signal output operation ofthe at least one external speaker in response to the selected contentoutput apparatus being an apparatus configured to provide contentincluding the audio signal and the video signal.

FIG. 20 is a view illustrating a process for determining a surround modein a user interface of a mobile apparatus according to an exemplaryembodiment.

A control screen 2010 for an external speaker, which is displayed by theuser interface 1720 of the mobile apparatus 1700, is illustrated in FIG.20.

In response to a source item 2020 being selected in the control screen2010 for a speaker existing in a living room, a list for various sourcedevices is displayed. In response to a user operation for selecting a TVitem 2030 existing in the living room among the various source devicesbeing input, since the TV is an apparatus configured to provide contentincluding a video signal and an audio signal, the controller 1730 of themobile apparatus 1700 may transmit the control signal, which allows theTV to be operated in the first output mode which outputs the videosignal and the audio signal through synchronization with an audio signaloutput operation of the speaker existing the living room, to the TVexisting in the living room.

The TV receives the control signal transmitted from the mobile apparatus1700 and is operated in the first output mode. A control screen 2040 fora speaker, which indicates that communication with the TV existing inthe living room is connected and the audio signal is provided from theTV, is displayed in the user interface 1720 of the mobile apparatus1700.

In response to a user operation for grouping at least one of the atleast one external speaker in the control screen being input, thecontroller 1730 may transmit the control signal, which allows a contentoutput apparatus to communicate with the external speakers that aregrouped according to an output mode corresponding to the kind of contentoutput apparatus, to the content output apparatus.

For example, in response to a user operation for grouping an externalspeaker existing in a bedroom and an external speaker existing in aliving room being input in the state in which a CD layer which is acurrent content output apparatus transmits an audio signal to theexternal speaker existing in the living room and output the audiosignal, the controller 1730 may transmit the control signal, whichallows the CD player to communicate with the external speakers existingin the bedroom and the living room, which are grouped according to thesecond output mode corresponding to the CD player, to the CD player.

FIG. 21 is a view illustrating a process for determining an output modein response to an external speaker being added in the state in which anapparatus configured to output only an audio signal is a source deviceaccording to an exemplary embodiment.

Referring to FIG. 21, in the state in which an audio signal is outputthrough a speaker of a CD player (S2110), a user operation for addingthe external speaker in a control screen of the mobile apparatus 1700 isinput (S2120). An item for adding the external speaker may beimplemented with an icon called “group”, but this is not limitedthereto. The item for adding may be implemented with various names.

Since the current source device is the CD player, and the CD player isan apparatus configured to output only the audio signal, a controller ofthe CD player sets the output mode to the multi-room mode (S2130).Unlike the setting of the surround mode in FIG. 19, the communicationmethod between the external speaker and the CD player is maintained as aWi-Fi method. That is, the existing communication method is maintained(S2140).

The controller of the CD player performs delay processing on the audiosignal of the CD player by transmission delay and outputs the delayedaudio signal (S2150), and the audio signal output from the CD player maybe in synchronization with the audio signal output from the externalspeaker. Therefore, the audio signals output from the CD player and theaudio signal output from the external speaker are in synchronizationwith each other and output simultaneously (S2160).

FIG. 22 is a view illustrating a process for determining a multi-roommode in a user interface of a mobile apparatus according to an exemplaryembodiment.

Control screens for two external speakers displayed by the userinterface 1720 of the mobile apparatus 1700 are illustrated in FIG. 22.Specifically, the control screens for two external speakers include acontrol screen 2210 for a speaker existing in a living room and acontrol screen for a speaker existing in a bedroom. It is assumed thatthe audio signal output from the current CD player is output onlythrough the speaker existing in the bedroom.

In response to a group item 2220 for adding another external speakerbeing selected in the control screen 2210 for the speaker existing inthe living room, a list for speakers according to groups is displayed.FIG. 22 has exemplified that speakers are grouped according to a placein which the speakers are located, but the grouping of the speakers isnot limited thereto. The grouping of the speakers may be performedaccording to Alphabetical order, output performance, or other criteriafor grouping.

In response to a user operation for selecting an item 2230 for selectingthe speaker located in the bedroom in the list for the speakersaccording to the group being input, and a user operation 2240 forexecuting the item 2230 being input, since the CD player is an apparatusconfigured to provide content including only an audio signal, thecontroller 1730 of the mobile apparatus 1700 may transmit the controlsignal, which controls the CD player to be operated in the second modethat outputs the audio signal through the newly added speaker located inthe bedroom in synchronization with an audio signal output operation ofthe speaker located in the living room, to the CD player.

Thus, the CD player receives the control signal transmitted from themobile apparatus 1700 and is operated in the second output mode, and acontrol screen 2250 for the speaker located in the living room and thespeaker located in the bed room, which indicates that all the speakerslocated in the living room and the bed room communicate with the CDplayer, and the audio signal is provided from the CD player to thespeakers, is displayed in the user interface 1720 of the mobileapparatus 1700.

FIG. 23 is a flow chart illustrating a method of controlling a contentoutput apparatus according to an exemplary embodiment.

The method illustrated in FIG. 23 is a controlling method of a contentoutput apparatus including a receiver configured to receive content, adisplay configured to output a video signal of the content, a speakerconfigured to output an audio signal of the content, and a communicatorconfigured to transmit the audio signal to at least one externalspeaker. According to the controlling method of a content outputapparatus illustrated in FIG. 23, in response to the content beinginput, it is determined that the audio signal is related to the videosignal (S2310).

A screen for inducing a selection of an output mode which transmits theaudio signal to at least one external speaker with a communicationmethod corresponding to the determination result among a plurality ofoutput modes is displayed (S2320).

The audio signal of the content is transmitted to the at least oneexternal speaker by operating the content in the selected output mode(S2330).

The transmitting may include controlling the display and the speaker tooutput the video signal and the audio signal in synchronization with anaudio signal output operation of the at least one external speaker inthe first output mode among the plurality of output modes, andcontrolling the speaker to output the audio signal in synchronizationwith the audio signal output operation of the at least one externalspeaker in the second output mode among the plurality of output modes.

The transmitting may include transmitting the audio signal to the atleast one external speaker, and controlling the display and the speakerto output the video signal and the audio signal in synchronization withthe audio signal and separately perform the audio signal outputoperation of the at least one external speaker in the third output modeamong the plurality of output modes.

The transmitting may further include controlling the communicator toperform communication with the at least one external speaker in thefirst output mode through a second communication method different from afirst communication method in the second output mode and the thirdoutput mode.

The controlling of the communicator may include controlling thecommunicator to perform communication with the at least one externalspeaker through a Wi-Fi Direct method in the first output mode, and toperform communication with the at least one external speaker through aWi-Fi method in the second output mode and the third output mode.

The transmitting may include allowing the content output apparatus to beoperated in the first output mode in response to the video signal beingincluded in the content, and allowing the content output apparatus to beoperated in the second output mode in response to the video signal notbeing included in the content.

The method of controlling a content output apparatus according to anexemplary embodiment may further include determining whether or not thevideo signal is included in the content based on the kind of sourcedevice configured to provide the content and coupled to the contentoutput apparatus.

The transmitting may include allowing the content output apparatus to beoperated in one of the first output mode, the second output mode, andthe third output mode according to a user operation for selecting theoutput mode.

The transmitting may further include displaying an information messagefor an output mode selection in the display in response to the firstoutput mode being selected by a user operation in the state in which thevideo signal is not included in the content.

The transmitting may include allowing the content output apparatus to beoperated in one of the first output mode and the third output modeaccording to the user operation in the state in which the video signalis included in the content.

FIG. 24 is a flow chart illustrating a method of controlling a mobileapparatus according to an exemplary embodiment.

According to the method illustrated in FIG. 24, communication with atleast one external speaker is performed (S2410).

Then, a control screen for the at least one external speaker isdisplayed (S2420).

An operation of the external speaker is controlled according to a useroperation input in the control screen (S2430).

The controlling may include transmitting the control signal, whichcontrols a content output apparatus to communicate with the externalspeaker according to an output mode corresponding to the kind of contentoutput apparatus among a plurality of output modes, to the contentoutput apparatus in response to the content output apparatus configuredto provide an audio signal to the external speaker being selected in thecontrol screen.

The plurality of output modes may include at least one of a first outputmode that provides the audio signal to the at least one externalspeaker, and outputs the video signal and the audio signal insynchronization with an audio signal output operation of the at leastone external speaker, a second output mode that provides the audiosignal to the at least one external speaker, and outputs the audiosignal in synchronization with the audio signal output operation of theat least one external speaker, and a third output mode that provides theaudio signal to the at least one external speaker, and outputs the videosignal and the audio signal in synchronization and separately performsthe audio signal output operation of the at least one external speaker.

The controlling may include transmitting the control signal forcontrolling the content output apparatus to be operated in one of thefirst output mode, which outputs the video signal and the audio signalin synchronization with the audio signal output operation of the atleast one external speaker, and the third output mode, which outputs thevideo signal and the audio signal in synchronization and separatelyperforms the audio signal output operation of the at least one externalspeaker, to the content output apparatus in response to the contentoutput apparatus being an apparatus configured to provide contentincluding the video signal and the audio signal. The controlling mayfurther include transmitting the control signal for controlling thecontent output apparatus to be operated in the second output mode, whichoutputs the audio signal in synchronization with the audio signal outputoperation of the at least one external speaker, to the content outputapparatus in response to the content output apparatus being an apparatusconfigured to provide content including only the audio signal.

The controlling may include transmitting the control signal, whichcontrols the content output apparatus to communicate with the externalspeaker according to one of the plurality of output modes determinedbased on a reproduction mode of content provided from a selected contentoutput apparatus, to the content output apparatus in response to thecontent output apparatus configured to provide the audio signal to theexternal speaker being selected in the control screen.

The controlling may include transmitting the control signal, whichcontrols the content output apparatus to communicate with externalspeakers grouped according to an output mode corresponding to the kindof content output apparatus, to the content output apparatus in responseto a user operation for grouping at least one of the at least oneexternal speaker in the control screen being input.

A non-transitory computer-readable medium, in which programs forsequentially executing the controlling methods according to theexemplary embodiments are stored, may be provided.

As an example, a non-transitory computer-readable medium, in which aprogram for executing an operation of determining whether the audiosignal is related to the video signal in response to the content beinginput, displaying a screen for inducing an output mode which transmitsthe audio signal to the at least one external speaker with acommunication method corresponding to the determination result among aplurality of output modes, and transmitting the audio signal of thecontent to the at least one external speaker by operating the content inthe selected output mode, may be provided.

As another example, a non-transitory computer-recordable medium, inwhich a program for executing an operation of controlling an operationof an external speaker according to a user operation input to a controlscreen is stored, may be provided.

The non-transitory computer-recordable medium is not a medium configuredto temporarily store data such as a register, a cache, or a memory butan apparatus-readable medium configured to semi-permanently store data.Specifically, the above-described various applications or programs maybe stored in the non-transitory apparatus-readable medium such as a CD,a DVD, a hard disc, a BD, a USB storage device, a memory card, or a readonly memory (ROM), and provided.

Although buses are not illustrated in the block diagrams illustratingthe content output apparatus and the mobile apparatus, communicationbetween configurations in the content output apparatus and the mobileapparatus may be performed using bus connections. A processor such as acentral processing unit (CPU), or a microprocessor configured to performthe above-described various operations may be further included in theapparatuses.

The foregoing exemplary embodiments and advantages are merely exemplaryand are not to be construed as limiting the present inventive concept.The exemplary embodiments can be readily applied to other types ofdevices. Also, the description of the exemplary embodiments is intendedto be illustrative, and not to limit the scope of the claims, and manyalternatives, modifications, and variations will be apparent to thoseskilled in the art.

What is claimed is:
 1. A content output apparatus comprising: a receiverconfigured to receive content; a display configured to output a videosignal of the content; a speaker configured to output an audio signal ofthe content; a communicator configured to transmit the audio signal toat least one external speaker; and a controller configured to determinewhether the audio signal is related to the video signal, and display auser interface screen for inducing a selection of an output mode whichtransmits the audio signal to the at least one external speaker with acommunication method corresponding to the determination result among aplurality of output modes via the display.
 2. The content outputapparatus as claimed in claim 1, wherein the controller is configured tocontrol the display and the speaker to synchronize the output of thevideo signal and the output of the audio signal with an audio signaloutput operation of the at least one external speaker in a first outputmode among the plurality of output modes, and control the speaker tosynchronize the output of the audio signal with the audio signal outputoperation of the at least one external speaker in a second output modeamong the plurality of output modes.
 3. The content output apparatus asclaimed in claim 1, wherein the controller is configured to in responseto the audio signal being determined to be related to the video signal,even though a user manipulation for selecting the second output mode viathe user interface screen is input, display a user interface forinducing to select the first output mode or operate in the first outputmode automatically.
 4. The content output apparatus as claimed in claim1, wherein the controller is configured to in response to the audiosignal being determined to be related to the video signal, activate auser interface for selecting the first output mode and deactivate a userinterface for selecting the second output mode in the user interfacescreen.
 5. The content output apparatus as claimed in claim 2, whereinthe controller is configured to transmit the audio signal to the atleast one external speaker, and control the display and the speaker tosynchronize the output of the video signal by the display and the audiosignal by the speaker unit with the audio signal output operation of theat least one external speaker performed separately in a third outputmode among the plurality of output modes.
 6. The content outputapparatus as claimed in claim 5, wherein the controller is configured tocontrol the communicator to perform communication with the at least oneexternal speaker in the first output mode through a second communicationmethod that is different from a first communication method used in thesecond output mode and the third output mode.
 7. The content outputapparatus as claimed in claim 6, wherein the controller is configured tocontrol the communicator to perform communication with the at least oneexternal speaker through a Wi-Fi Direct method in the first output mode,and to perform communication with the at least one external speakerthrough a Wi-Fi method in the second output mode and the third outputmode.
 8. The content output apparatus as claimed in claim 2, wherein thecontroller is configured to be operated in the first output mode inresponse to determining that the video signal is included in the contentreceived by the receiver, and to be operated in the second output modein response to determining that the video signal is not included in thecontent received by the receiver.
 9. The content output apparatus asclaimed in claim 8, further comprising a connector configured to beconnectable to a source device configured to provide the content,wherein the controller is configured to determine whether the videosignal is included in the content based on a type of the source devicecoupled to the connector.
 10. The content output apparatus as claimed inclaim 5, wherein the controller is configured to be operated in one ofthe first to third output modes according to a user operation forselecting an output mode.
 11. The content output apparatus as claimed inclaim 10, wherein the controller is configured to display an informationmessage for an output mode selection in the display in response to thefirst output mode being selected by the user operation in a state inwhich the video signal is not included in the content received by thereceiver.
 12. The content output apparatus as claimed in claim 10,wherein the controller is configured to be operated in one of the firstoutput mode and the third mode according to the user operation in astate in which the video signal is included in the content received inthe receiver.
 13. A mobile apparatus comprising: a communicatorconfigured to communicate with at least one external speaker; a userinterface configured to display a control screen for the at least oneexternal speaker; and a controller configured to control an operation ofthe external speaker according to a user operation input to the controlscreen, wherein the controller is configured to transmit a controlsignal, which controls a content output apparatus to communicate withthe external speaker according to an output mode corresponding to a typeof the content output apparatus among a plurality of output modes, tothe content output apparatus in response to the content output apparatusconfigured to provide an audio signal to the external speaker beingselected in the control screen.
 14. The mobile apparatus as claimed inclaim 13, wherein the controller is configured to transmit the controlsignal to control the content apparatus to communicate with the externalspeaker according to the plurality of output modes, wherein theplurality of output modes include at least one of a first output modewhich provides the audio signal to the at least one external speaker andoutputs a video signal and the audio signal in synchronization with anaudio signal output operation of the at least one external speaker, asecond output mode which provides the audio signal to the at least oneexternal speaker and outputs the audio signal in synchronization withthe audio signal output operation of the at least one external speaker,and a third output mode which provides the audio signal to the at leastone external speaker and outputs the video signal and the audio signalin synchronization with the video signal and the audio signal outputoperation of the at least one external speaker is performed separately.15. The mobile apparatus as claimed in claim 14, wherein the controlleris configured to transmit the control signal for controlling the contentoutput apparatus to be operated in one of the first output mode, whichoutputs the video signal and the audio signal in synchronization withthe audio signal output operation of the at least one external speaker,and the third output mode, which outputs the video signal and the audiosignal in synchronization with the video signal and the audio signaloutput operation of the at least one external speaker is performedseparately, to the content output apparatus in response to the contentoutput apparatus being an apparatus configured to provide contentincluding the video signal and the audio signal, and the controller isconfigured to transmit the control signal for controlling the contentoutput apparatus to be operated in the second output mode, which outputsthe audio signal in synchronization with the audio signal outputoperation of the at least one external speaker, to the content outputapparatus in response to the content output apparatus being an apparatusconfigured to provide content including only the audio signal.
 16. Themobile apparatus as claimed in claim 13, wherein the controller isconfigured to transmit the control signal, which controls the contentoutput apparatus to communicate with the external speaker according toone of the plurality of output modes determined based on a reproductionmode of the content provided from the content output apparatus, to thecontent output apparatus in response to the content output apparatusconfigured to provide the audio signal to the at least one externalspeaker being selected in the control screen.
 17. The mobile apparatusas claimed in claim 13, wherein the controller is configured to transmitthe control signal, which controls the content output apparatus tocommunicate with a grouped external speaker according to the output modecorresponding to the a type of the content output apparatus, to thecontent output apparatus in response to a user operation for grouping atleast one of the at least one external speaker being input to thecontrol screen.
 18. A method of controlling a content output apparatusincluding a receiver configured to receive content, a display configuredto output a video signal of the content, a speaker configured to outputan audio signal of the content, and a communicator configured totransmit the audio signal to at least one external speaker, the methodcomprising: determining whether the audio signal is related to the videosignal in response to the content being input; displaying a screen forinducing a selection of an output mode which transmits the audio signalto the at least one external speaker with a communication methodcorresponding to the determination result among a plurality of outputmodes; and transmitting the audio signal of the content to the at leastone external speaker by operating the content in the selected outputmode
 19. The method as claimed in claim 18, wherein the transmittingcomprises controlling the display and the speaker to output the videosignal and the audio signal in synchronization with an audio signaloutput operation of the at least one external speaker in a first outputmode among the plurality of output modes, and controlling the speaker tooutput the audio signal in synchronization with the audio signal outputoperation of the at least one external speaker in a second output modeamong the plurality of output modes.
 20. A method of controlling amobile apparatus, the method comprising: communicating with at least oneexternal speaker; displaying a control screen for controlling the atleast one external speaker; and controlling an operation of the externalspeaker according to a user operation input to the control screen,wherein the controlling comprises transmitting a control signal, whichcontrols a content output apparatus to communicate with the externalspeaker according to an output mode among a plurality of output modescorresponding to a type of the content output apparatus, to the contentoutput apparatus in response to the content output apparatus configuredto provide an audio signal to the external speaker being selected in thecontrol screen.